#include<stdio.h>

struct student{
	int score;
	char s[20];
	int number;
};

int main(void)
{
	int a=5;
	int *p=&a;
	int **q=&p;
	
	*p=10;
	
	printf("a=%d\n",a);
	printf("*p=%d\n",*p);
	
	**q=20;
	
	printf("a=%d\n",a);
	printf("*p=%d\n",*p);
	printf("**q=%d",**q);
}
